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Strange leaking, foghorn noise on boost..... Help!!
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Old 03 Feb 2009, 06:08 PM   #1 (permalink)
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Strange leaking, foghorn noise on boost..... Help!!

Hi guys

ok so I have a 02 impreza and I have changed all intercooler, turbo hoses for silicone ones as I get this huge leaking sound on boost..... Also changed the dump valve as someone thought it might be that but its still there.

Basically when it hits boost it sounds like boost is leaking then a deep foghorn type sound come from it and sometimes it stinks of fuel.....

I thought it would have been a pipe that had a leak but ive changed everything...

Any ideas please?

Any tips as to try to find out what it is??? I love the car just want to find out what is wrong with it or where its leaking air from....

Cheers

Steve
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Old 03 Feb 2009, 07:30 PM   #2 (permalink)
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Re: Strange leaking, foghorn noise on boost..... Help!!

Could be the fuel pressure regulator theirs a vacuum pipe on that back to intake manifold it prob not it but worth a try this vacuum pipe carries excess fuel vapour back into manifold so that could be smell off fuel you getting if it cut and the back pressure from this regulator could cause this noise if they a hole or cut on that vacuum pipe on the fuel pressure regulator worth a try heres a pic, mine is on the end off the fuel rail towards back of engine drivers side by turbo know you have the 02impreza this is on my sti v6 classic should look nearly the same have a look at vacuum pipe hopefully that your problem look at the blue arrow this the vacuum pipe back to manifold

Last edited by stiimpreza1984; 08 Mar 2009 at 01:30 AM.
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Old 03 Feb 2009, 07:34 PM   #3 (permalink)
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Re: Strange leaking, foghorn noise on boost..... Help!!

Hi mate

at the moment I will try anything as ive tried everything so worth a look.

Just want to enjoy my scooby.......

Steve
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